// import parseTime, formatTime and set to filter
export {
  parseTime,
  formatTime
}
from '@/utils'
import GlobalConstant from '@/utils/constants'
import TagStyleObject from '@/utils/tag-style-object'
import moment from 'moment'

/**
 * Show plural label if time is plural number
 * @param {number} time
 * @param {string} label
 * @return {string}
 */
function pluralize(time, label) {
  if (time === 1) {
    return time + label
  }
  return time + label + 's'
}

/**
 * @param {number} time
 */
export function timeAgo(time) {
  const between = Date.now() / 1000 - Number(time)
  if (between < 3600) {
    return pluralize(~~(between / 60), ' minute')
  } else if (between < 86400) {
    return pluralize(~~(between / 3600), ' hour')
  } else {
    return pluralize(~~(between / 86400), ' day')
  }
}

/**
 * Number formatting
 * like 10000 => 10k
 * @param {number} num
 * @param {number} digits
 */
export function numberFormatter(num, digits) {
  const si = [{
      value: 1E18,
      symbol: 'E'
    },
    {
      value: 1E15,
      symbol: 'P'
    },
    {
      value: 1E12,
      symbol: 'T'
    },
    {
      value: 1E9,
      symbol: 'G'
    },
    {
      value: 1E6,
      symbol: 'M'
    },
    {
      value: 1E3,
      symbol: 'k'
    }
  ]
  for (let i = 0; i < si.length; i++) {
    if (num >= si[i].value) {
      return (num / si[i].value + 0.1).toFixed(digits).replace(/\.0+$|(\.[0-9]*[1-9])0+$/, '$1') + si[i].symbol
    }
  }
  return num.toString()
}

/**
 * 10000 => "10,000"
 * @param {number} num
 */
export function toThousandFilter(num) {
  return (+num || 0).toString().replace(/^-?\d+/g, m => m.replace(/(?=(?!\b)(\d{3})+$)/g, ','))
}

/**
 * Upper case first char
 * @param {String} string
 */
export function uppercaseFirst(string) {
  return string.charAt(0).toUpperCase() + string.slice(1)
}

/**
 * 列表常量value key过滤器
 * @param {String} key
 * @param {String} constantName
 */
export function constantKeyValue(key, constantName) {
  const statusMap = GlobalConstant[constantName]
  const obj = statusMap[key]
  if (obj === undefined) {
    return ''
  } else {
    return statusMap[key].text || ''
  }
}
/**
 * 列表常量value key tag-style过滤器
 * @param {String} key
 * @param {String} constantName
 */
export function constantKeyTagStyleObj(key, constantName) {
  const statusMap = GlobalConstant[constantName]
  const obj = statusMap[key]
  if (obj === undefined) {
    return ''
  } else {
    return TagStyleObject[statusMap[key].tagColor] || ''
  }
}

/**
 * 时间过滤器
 * @param {String} dataStr
 * @param {String} fmtstring
 */
export function datefmt(dataStr, fmtstring = 'YYYY-MM-DD HH:mm:ss') {
  if (dataStr) {
    return moment(dataStr).format(fmtstring)
  } else {
    return '-'
  }
}

/**
 * 前端分页过滤器
 * @param {Array} tabledata
 * @param {int} pageNum
 * @param {int} pagesize
 */
export function paging(tabledata, pageNum, pagesize) {
  return tabledata.slice((pageNum - 1) * pagesize, pageNum * pagesize)
}
